Gas detection module and mobile terminal

Abstract

A gas detection module includes: a fixed seat, a gas sensor including a detection chamber, and a micro pump. The micro pump includes a pump chamber, a first communication port, and a second communication port. The first and second communication ports are in communication with the pump chamber. The gas sensor and the micro pump are arranged side by side on the fixed seat, the fixed seat is provided with a first and a second fluid port that are both in communication with the outside of the fixed seat, the first fluid port is in communication with the detection chamber, the second fluid port is in communication with the second communication port, a flow channel is further formed on the fixed seat. One end of the flow channel is in communication with the first fluid port, and the other end is in communication with the first communication port.

What is claimed is: 
     
         1 . A gas detection module, comprising:
 a gas sensor, the gas sensor comprising a detection chamber;   a micro pump, the micro pump comprising a pump chamber, a first communication port, and a second communication port, the first communication port and the second communication port being in communication with the pump chamber; and   a fixed seat,   wherein the gas sensor and the micro pump are arranged side by side on the fixed seat,   wherein the fixed seat is provided with a first fluid port and a second fluid port,   wherein the first fluid port and the second fluid port are both in communication with the outside of the fixed seat, the first fluid port is in communication with the detection chamber, and the second fluid port is in communication with the second communication port,   wherein a flow channel is formed on the fixed seat, one end of the flow channel is in communication with the first fluid port, and the other end thereof is in communication with the first communication port; and   wherein a volume of the flow channel between the first fluid port and the first communication port is Vs 1 , and   
       
         
           
             
               
                 
                   Vs 
                   1 
                 
                 ≤ 
                 
                   Vm 
                   Fg 
                 
               
               , 
             
           
         
       
       wherein Vm is a flow rate of the micro pump, and Fg is a detection frequency of the gas sensor. 
     
     
         2 . The gas detection module according to  claim 1 , wherein a mounting chamber is formed in the fixed seat, the gas sensor is located in the mounting chamber, positions at which the gas sensor is in contact with the mounting chamber are all hermetically connected, the mounting chamber is in communication with the first fluid port, and the flow channel is in communication with the mounting chamber. 
     
     
         3 . The gas detection module according to  claim 1 , wherein a gas-permeable filtering element is disposed in the first fluid port and/or the second fluid port, and the gas-permeable filtering element is configured to filter liquid in gas sucked into the first fluid port and/or the second fluid port. 
     
     
         4 . The gas detection module according to  claim 1 , further comprising:
 a circuit board configured to be electrically connected to a main control board in a mobile terminal, wherein the circuit board is disposed on one side of the gas sensor, and the circuit board is electrically connected to the gas sensor and is electrically connected to the micro pump.   
     
     
         5 . The gas detection module according to  claim 1 , wherein the fixed seat comprises a side wall opposite to a gas inlet of the detection chamber, the first fluid port is provided on the side wall, a reservoir chamber in communication with the first fluid port is formed on a wall surface that is of the side wall and that is opposite to the gas inlet of the detection chamber, and the reservoir chamber is in communication with the detection chamber. 
     
     
         6 . The gas detection module according to  claim 1 , wherein the micro pump is a unidirectional micro pump or a bidirectional micro pump. 
     
     
         7 . The gas detection module according to  claim 1 , wherein the fixed seat comprises:
 a bottom board, having a first surface and a second surface that are opposite to each other; and   a separation board, disposed at the middle of the first surface, wherein the bottom board forms a first side located on a first side of the separation board and a second side located on a second side of the separation board, wherein the first fluid port is provided on the first side, the second fluid port is provided on the second side, the flow channel is provided on the first surface and extends from the first side to the second side, the gas sensor is disposed on the first side, and the micro pump is disposed on the second side.   
     
     
         8 . The gas detection module according to  claim 7 , wherein the fixed seat further comprises:
 an enclosure board, disposed on the first side and enclosing the mounting chamber with the separation board, wherein the gas sensor is disposed in the mounting chamber and the positions at which the gas sensor is in contact with the mounting chamber are all connected using a sealant layer, the mounting chamber is in communication with the first fluid port, and an end portion of the flow channel extending to the first side is in communication with the mounting chamber.   
     
     
         9 . The gas detection module according to  claim 8 , wherein the micro pump comprises a vibration exciting plate, the vibration exciting plate is capable of vibrating when an electrical signal is loaded to the vibration exciting plate, the vibration exciting plate is located on one side of the micro pump away from the first surface, and the enclosure board and a surface of the separation board away from the first surface are higher than a surface of the vibration exciting plate. 
     
     
         10 . The gas detection module according to  claim 7 , wherein a fluid groove is formed on the first surface of the second side, the fluid groove extends to an outer edge of the second side, and the fluid groove forms the second fluid port. 
     
     
         11 . The gas detection module according to  claim 1 , further comprising:
 a control module, electrically connected to the gas sensor; and   a drive chip, electrically connected to the micro pump and configured to load an electrical signal to a vibration exciting plate of the micro pump, wherein the drive chip is electrically connected to the control module.   
     
     
         12 . The gas detection module according to  claim 1 , wherein the fixed seat is composed of a metal material. 
     
     
         13 . A mobile terminal, the mobile terminal comprising:
 a housing; and   a gas detection module,   wherein the gas detection module is disposed in the housing,   wherein a first gas hole and/or a second gas hole are/is provided on the housing,   wherein the first gas hole is in communication with a first fluid port, and the second gas hole is in communication with a second fluid port,   wherein the gas detection module comprises:
 a gas sensor, the gas sensor comprising a detection chamber; 
 a micro pump, the micro pump comprising a pump chamber, a first communication port, and a second communication port, the first communication port and the second communication port being in communication with the pump chamber; and 
 a fixed seat, 
   wherein the gas sensor and the micro pump are arranged side by side on the fixed seat,   wherein the fixed seat is provided with a first fluid port and a second fluid port,   wherein the first fluid port and the second fluid port are both in communication with the outside of the fixed seat, the first fluid port is in communication with the detection chamber, and the second fluid port is in communication with the second communication port,   wherein a flow channel is formed on the fixed seat, one end of the flow channel is in communication with the first fluid port, and the other end thereof is in communication with the first communication port; and   wherein a volume of the flow channel between the first fluid port and the first communication port is Vs 1 , and   
       
         
           
             
               
                 
                   Vs 
                   1 
                 
                 ≤ 
                 
                   Vm 
                   Fg 
                 
               
               , 
             
           
         
       
       wherein Vm is a flow rate of the micro pump, and Fg is a detection frequency of the gas sensor. 
     
     
         14 . The mobile terminal according to  claim 13 , wherein a mounting chamber is formed in the fixed seat, the gas sensor is located in the mounting chamber, positions at which the gas sensor is in contact with the mounting chamber are all hermetically connected, the mounting chamber is in communication with the first fluid port, and the flow channel is in communication with the mounting chamber. 
     
     
         15 . The mobile terminal according to  claim 13 , wherein a gas-permeable filtering element is disposed in the first fluid port and/or the second fluid port, and the gas- permeable filtering element is configured to filter liquid in gas sucked into the first fluid port and/or the second fluid port. 
     
     
         16 . The mobile terminal according to  claim 13 , further comprising:
 a circuit board configured to be electrically connected to a main control board in a mobile terminal, wherein the circuit board is disposed on one side of the gas sensor, and the circuit board is electrically connected to the gas sensor and is electrically connected to the micro pump.   
     
     
         17 . The mobile terminal according to  claim 13 , wherein the fixed seat has a side wall opposite to a gas inlet of the detection chamber, the first fluid port is provided on the side wall, a reservoir chamber that is in communication with the first fluid port is formed on a wall surface that is of the side wall and that is opposite to the gas inlet of the detection chamber, and the reservoir chamber is in communication with the detection chamber. 
     
     
         18 . The mobile terminal according to  claim 13 , wherein the first gas hole and/or the second gas hole are/is a microphone hole provided on the housing.